在mac os上安裝mysql5.7.11

mysql> update user set authentication_string=password('root') where user='root' and host='localhost';
Query OK, 1 row affected, 1 warning (0.01 sec)
Rows matched: 1  Changed: 1  Warnings: 1

在mac os上安裝mysql5.7.11

安裝好以後，登錄mysql

bash-3.2$ mysql -u root -p

出現如下錯誤信息：

error: 'Access denied for user 'root'@'localhost' (using password: NO)'

這是因爲root密碼問題，修改root密碼，如下：

bash-3.2$ mysqladmin -u root password root
mysqladmin: connect to server at 'localhost' failed
error: 'Access denied for user 'root'@'localhost' (using password: NO)'

出現上面錯誤；
切換到mac os管理員賬號；

bash-3.2$ su root
Password:

執行如下mysql指令，取消對mysql賬號的安全驗證；

sh-3.2# mysqld_safe --user=mysql --skip-grant-tables --skip-networking &
[1] 9569
sh-3.2# 2016-03-14T13:40:49.6NZ mysqld_safe Logging to '/usr/local/mysql/data/liguohuideMacBook-Pro.local.err'.
2016-03-14T13:40:49.6NZ mysqld_safe Starting mysqld daemon with databases from /usr/local/mysql/data
sh-3.2# mysql -u root mysql
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A

Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 25
Server version: 5.7.11 MySQL Community Server (GPL)

Copyright (c) 2000, 2016, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

執行修改root用戶密碼指令：

mysql> update user set authentication_string=password('root') where user='root' and host='localhost';
Query OK, 1 row affected, 1 warning (0.01 sec)
Rows matched: 1  Changed: 1  Warnings: 1

刷新權限：

mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)

退出mysql數據庫；

mysql> quit
Bye

關閉所有mysqld的進程；
bash-3.2$ killall -TERM mysqld


啓動mysql安全模式；
bash-3.2$ mysqld_safe &


重啓mysql數據庫，用賬戶root登錄mysql
bash-3.2$ mysql -u root -p
Enter password: 
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 195
Server version: 5.7.11


Copyright (c) 2000, 2016, Oracle and/or its affiliates. All rights reserved.


Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.


Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.


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